Portable electric light



w. D. KAI-[N ET AL PORTABLE ELECTRIC LIGHT Filed .April 7, 1922 N M R O E 0N5 N THM R NA@ m w fl 1 D A .I A R u UR we Patented June 30, 1925.

UNITED STATES WALTER D. KAHN, OF WEST ORANGE, AND GEORGE A. THOMSON, OF NEWARK,

PATENT omen,

JERSEY, ASSIGNORS TO DIAMOND ELECTRIC SPECIALTIES CORPORATION; OF NEWARK, NEW JERSEY, A CORPORATION OF NEW J PORTABLE ELECTRIC LIGHT.

Application filed April 7,

To all whom it may concern:

Be it known that we. \VALTER D. KAHN, a citizen of the l mited States, and a resident of \Vest Orange. county of Essex, and State of New Jersey. and Gnoncn A. THOM- SON, a citizen of the lnited States, and a resident of Newark. county of Essex, and State of New Jersey, have invented an ID1- provement in Portable Electric Lights, ofwhich the following is a specification.

Our invention relates to a portable electric light adapted to be operated from dry. cells or other-suitable source of current and aims to provide a structure of the class described, which. is compact andof con venient form and is adapted to take cells of a relatively large size in a relatively,

small case. thus producing alight which has a long life without being so bulky as to be inconvenient to the user.

()ur invention also aims to provide a device which .is readily and cheaply made and assembled and which has the minimum number of parts of rugged construction'and will stand considerable rough usage without being put out of order.

Our improved device embodies many 1m- "provements over the devices of this par-v ticular character known ,to the prior art, of which we may cite the ability to open the case to inspect the parts while all of the parts are in operating condition, the provision of a simple but exact focusing device, the vprovision of a switch of improved type, etc.

In the drawings accompanying this specification: I

Fig. 1 shows a front View of our improved lamp;

Fig. 2 a front view of the cover removed, the cells being in plane;

Fig. 3 a front view of the cover and cells removed; and

Fig. 4 a sectional view taken on the line 44 of Fig. 3.

Referring to the drawings, it will be seen that our improved device comprises a case 1 which may be conveniently formed of. metal and is deep enough to contain the cells 2, the switch and other mechanism. The case is covered by a hinged cover 3 in whichis mounted a reflector 4 and lens 5 which may be conveniently held in place by means of 1922. Serial No. 550,322.

I the spring clips'6; ,Refiector 4, lens 5 and the bezel holding the lens are assembled in the case in one unit, clips 6 being riveted to the front of the case by eyelets 6', which pass through-- the clips, bezel and front of the case, thus affording a very simple-assem bly and because of the resiliency of'cli ps -fi providing a very 'eiiicient shoclr'fadsorber' for the lens and reflector. Should. it be desired to remove the reflector or lens, clips? I v v ,6 are rotated-upon the eyelet t fl e it removal of "the reflector. Thcfarrangement a. is preferably such that'igthe reflectorjextends,

inwardlyfinto thecase Land the cells 2' are Referring to Fig. 3, it will be seen that at the back of-the-case 1 there is provided a base- 8 of fibre or other suitable insulating material upon which are mounted the contact clips 9, 10, 11 and 12, these clips being held in place'by' means of eyelets-13, win any other suitable manner.

9- is adapted to engage one of the contacts of the lamp 19 and the spring extension 18 of the clip 12 is adapted to engage the plunge: of the switch 20. I

The lamp 19 is screwed into a threaded 'grouped'about 'the reflector as'clearlyshown 1n Fig-.2. Suitable-Incansfor holding the- The base 8 is cut away as at 14, 15, and 16*, to permit the.

-18 respectively.- The extension 1'2 of clip aperture in the movable plate 21 which 'is. guided by means of posts 22, upon which eyelets 23 carried by plate-21 run. It may thus be moved in and out'by the rotation of thascrew 24, butbeing mounted ontwo posts can not turn. The screw 24 is in threaded engagement with the plate 21, and if desired, a spring 25 may be carried by the screw 24, tending to force the lamp into its outward position and acting as a shock absorber to take up the force of shocks which might cause breakage of the filament of the lamp 19. A suitable limit stop 26 is provided. By the rotation of screw 24 through the knurled head 27 or any other suitable means, the lamp may be moved inwardly and outwardly in the reflector and thus the light may be focused. It will be noted that the spring extension 17 of the clip 9 follows the lamp in its movement and a satisfactory contact is thus maintained at all times, irrespective of the adjustment of the lamp to focus. a

The switch comprises the plunger 20, guided in the yoke 28, which yoke is provided with suitable apertures as will be hereafter explained and the coil spring 29 tending to force the switch into the open position. Plunger 2O cooperates with extension 18 of the clip 12, which extension, being flexible, allows for a slight movement in response to a pressure upon the plunger, and being set at a slight angle as indicated, will insure a wiping contact, thus insuring a clean switch surface.

vPlunger 20 is provided at the top with a suitable operating knob 30 and at a convenient point intermediate its length with a locking pin 31 operating in an aperture in the yoke 28. This aperture is U-shaped, so that if the plunger 20 is depressed against action of spring 29 to meet the spring extension 18, a contact will be made only during the time that the plunger is held in the depressed position. If, however, when held in the depressed position, the plunger is turned so that the pin 31 will enter the lower leg" of the U-shaped aperture, the plunger will beheld locked in the depressed position and permanent illumination will be provided. If it is desired to lock the switch, so as to prevent operation of the device by accidental depression of the switch plunger, it is only necessary to turn the switch so that the pin 31 enters the upper. leg of the U, as shown in Fig. 3, in which position the plunger will be locked.

Attached to the fibre base 8 is an auxiliary socket 32 carrying a spare lamp 33. This lamp is not in circuit, but we have found it advisable to have a spare lamp available,

and have therefore designed this apparatus in such amanner that the spare lamp, while easily available, is protected from damage.

The fibre base 8 may be held in position by means of eyelets or rivets 34 passing through the rear wall of the case 1, it being understood, however, that suitable insulation isgprovided to prevent short-circuits between the eyelets'13 holding the clips in place.

We do not intend to confine ourselves to the particular modification shown and described since many changes may be made without departing from the spirit of our invention. 1

What we claim is:

1. In a device of the kind described, a switch comprising a plunger, a yoke within which the plunger is adapted to be moved and having a Ushaped aperture and ap'in i th off or on position.

3. In a device of the kind described, a case, a base of insulating material carried thereby and having cut-away portions adapted to fit a plurality of cells, and a plurality of metallic spring clip members adapted to interconnect the cells and carried by said base. 1

'4. A device of the kind described comprising a casing, a reflector secured tothe casing, cells in said casingya plurality of metallic spring clip members adapted to support and to interconnect said cells, a lamp associated with the reflector, an apertured plate upon which the lamp is carried,-

one of the before mentioned spring clip members contacting at all times with the base of said lamp, a plurality of guides 00- operating with. the apertures in said plate, a manually operable screw threaded member secured to the casing and cooperating with a threaded aperture in said plate for moving said plate and said lamp whereby to focus the latter, and a spring engagin the apertured plate and said casing an normally forcing the plate in one direction. 5. In a device of the kind described, a

cell, a lamp, means for moving the lamp into focus, and means compmsmg a clip cooperating with the cell to hold the latter and having a flexible flat spring extension contacting with the lamp and so arranged as to move with the lamp during the focusing operation and to remain in contact with said lamp during the focusing operation.

In testimony whereof, we have signed our names to this specification this 4th day of March, 1922.

- WALTER D. KAHN.

GEORGE A. THOMSON. 

